Nuget package available here: WpfAnimatedGif.

A simple library to display animated GIF images in WPF, usable in XAML or in code.

It's very easy to use: in XAML, instead of setting the Source property, set the AnimatedSource attached property to the image you want:

<Window x:Class="WpfAnimatedGif.Demo.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:gif="http://wpfanimatedgif.codeplex.com"
        Title="MainWindow" Height="350" Width="525">
    <Grid>
        <Image gif:ImageBehavior.AnimatedSource="Images/animated.gif" />

You can also specify the repeat behavior (the default is 0x, which means it will use the repeat count from the GIF metadata):

        <Image gif:ImageBehavior.RepeatBehavior="3x"
               gif:ImageBehavior.AnimatedSource="Images/animated.gif" />

And of course you can also set the image in code:

var image = new BitmapImage();
image.BeginInit();
image.UriSource = new Uri(fileName);
image.EndInit();
ImageBehavior.SetAnimatedSource(img, image);

See the wiki for more details on usage.

• Animates GIF images in a normal Image control; no need to use a specific control
• Takes actual frame duration into account
• Repeat behavior can be specified; if unspecified, the repeat count from the GIF metadata is used
• Notification when the animation completes, in case you need to do something after the animation
• Animation preview in design mode (must be enabled explicitly)
• Support for controlling the animation manually (pause/resume/seek)

WpfAnimatedGif is a personal open-source project. It is, and will remain, completely free of charge. That being said, if you want to reward me for the time I spent working on it, I'll gladly accept donations.